Here are some One Minutes festivals. These are dedicated to movies that are exactly 60 seconds in length in total with the subtitles. I know that some allow less, but not more. I personally find them fun and inspiring, at the same time diverse, fast and energetic. And you don't need to spend years on a long film production. I had my 40 seconds film in two of the festivals.

http://www.oneminute.ch/" onclick="window.open(this.href);return false; - this one is soon to be open for entries for 2015, in Switzerland

http://sandberg.nl/the-one-minutes" onclick="window.open(this.href);return false; - this one is an art institute in Amsterdam, and has lot's of exhibits including the one minutes series